Plot: Channel 4's multi-award-winning foreign affairs strand returns for a new series with a film following a volunteer ambulance service in Somalia's war-torn capital, Mogadishu. Reporter Seyi Rhodes and director Sasha Achilli accompany the extraordinary team who risk their lives braving bombs, gunfights and al-Shabaab militants to get sick people to hospital in a city where the government struggles to cope and where they are many people's only hope